# SendGrid

**Canonical:** https://apis.io/providers/sendgrid/  
**Website:** https://sendgrid.com/en-us  
**APIs profiled:** 63

SendGrid is a cloud-based email delivery platform, acquired by Twilio in 2019, that provides transactional and marketing email at scale over an HTTP v3 REST API and an SMTP relay. The platform spans Mail Send, dynamic transactional templates, Marketing Campaigns (contacts, lists, Segments 2.0, Single Sends), email address validation, suppression management, domain authentication (SPF/DKIM/DMARC), dedicated IP management and warm-up, subusers, Engagement Quality scoring, and detailed delivery statistics. Event data is delivered asynchronously through the Event Webhook and inbound mail through Inbound Parse. All APIs authenticate with a scoped bearer API key against api.sendgrid.com, with an EU data-residency host at api.eu.sendgrid.com. Developer documentation and the API reference are published on the Twilio documentation site.

## Kin Score — 77.4 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 77.4).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 73.5 |
| Governance | 41.7 |
| Contract Governance | 41.7 |
| Operational Transparency | 60.5 |
| Developer Ergonomics | 92.9 |
| Commercial Clarity | 100.0 |
| Access Clarity | 100.0 |

## Agent readiness — 54.5 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | verified |
| Event Surface Described | derived |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium (free trial) · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (63)

- **SendGrid Account API** — Twilio SendGrid Account Provisioning API account operations.
- **SendGrid Account State API** — Twilio SendGrid Account Provisioning API account state operations.
- **SendGrid Alerts API** — Twilio SendGrid Alerts API.
- **SendGrid API Keys API** — Twilio SendGrid API Keys API.
- **SendGrid Blocks API** — Twilio SendGrid Suppressions API: Blocks operations
- **SendGrid Bounces API** — Twilio SendGrid Suppressions API: Bounces operations
- **SendGrid Bulk Email Address Validation API** — The Twilio SendGrid Bulk Email Address Validation API
- **SendGrid Campaigns API API** — Legacy Marketing Campaigns: Campaigns API
- **SendGrid Categories API** — Twilio SendGrid Category Stats API
- **SendGrid Contacts API** — Twilio SendGrid Marketing Campaigns Contacts API
- **SendGrid Custom Fields API** — Twilio SendGrid Legacy Marketing Campaigns Contacts: Custom Fields API
- **SendGrid Designs API** — Twilio SendGrid Marketing Campaigns Designs API
- **SendGrid Domain Authentication API** — Twilio SendGrid Domain Authentication API
- **SendGrid Email Activity API** — Twilio SendGrid Email Activity API
- **SendGrid Email Address Validation API** — The Twilio SendGrid Email Address Validation API
- **SendGrid Enforced TLS API** — The Twilio SendGrid Enforced TLS API
- **SendGrid Engagement Quality API** — Twilio SendGrid Engagement Quality API
- **SendGrid Event Webhook API** — Twilio SendGrid Event Webhook API
- **SendGrid External Integration Endpoints API** — Third-Party Integrations for SendGrid Event Export
- **SendGrid Global Suppressions API** — Twilio SendGrid Suppressions API: Global Suppressions operations
- **SendGrid Invalid Emails API** — Twilio SendGrid Suppressions API: Invalid Emails operations
- **SendGrid IP Access Management API** — Twilio SendGrid IP Access Management API
- **SendGrid IP Address Management API** — Twilio SendGrid IP Address Management API
- **SendGrid IP Addresses API** — Twilio SendGrid IP Address API Operations
- **SendGrid IP Pools API** — Twilio SendGrid IP Address Pool API Operations
- **SendGrid IP Warmup API** — Twilio SendGrid IP Warmup API
- **SendGrid Link Branding API** — Twilio SendGrid Link Branding API
- **SendGrid Lists API** — Twilio SendGrid Legacy Marketing Campaigns Contacts: Lists API
- **SendGrid Mail Batch API** — Assign batch IDs to a send.
- **SendGrid Mail Send API** — Twilio Mail Send API.
- **SendGrid Mail Settings API** — Twilio SendGrid Mail Settings API
- **SendGrid Offering API** — Twilio SendGrid Account Provisioning API offerings operations.
- **SendGrid Parse Webhook API** — Twilio SendGrid Parse Webhook API
- **SendGrid Partner Settings API** — Twilio SendGrid Partner Settings API
- **SendGrid Point Delete System API** — Twilio SendGrid Recipients' Data Erasure API
- **SendGrid Recipients API** — Twilio SendGrid Legacy Marketing Campaigns Contacts: Recipients API
- **SendGrid Reverse DNS API** — Twilio SendGrid Reverse DNS API
- **SendGrid Scheduled Sends API** — Twilio SendGrid Scheduled Sends API
- **SendGrid Scopes API** — Twilio SendGrid Scopes API
- **SendGrid Segmenting Contacts API** — Twilio SendGrid Marketing Campaigns Segments API
- …and 23 more, listed in full on the page.

## MCP servers (1)

- **SendGrid MCP Server** — SendGrid's Model Context Protocol coverage is served by Twilio, its parent company. On 2026-08-13 the API Evangelist pipeline PROBED https://mcp.twilio.com/docs and got a live, ...

## Agentic access (1)

- **Sendgrid Agentic Access** — 389 operations · 209 acting · 5 human-in-the-loop

## Security (4)

- **Sendgrid Authentication** — http · 1 scheme
- **Sendgrid Domain Security** — TLSv1.3 · HSTS · DMARC
- **Sendgrid Vulnerability Disclosure** — Hackerone
- **Sendgrid Trust Center** — SOC 2 Type II, SOC 2 Type I, ISO/IEC 27001:2013, ISO/IEC 27017:2015, ISO/IEC 27018:2019, PCI DSS Level 1, PCI DSS Level 4, HIPAA (eligible products & services), Binding Corporat...

## Plans (1)

- **Sendgrid Plans Pricing**

## Tags

Email, Email API, Marketing Email, SMTP, T1, Transactional Email, Email Marketing, Deliverability, Marketing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sendgrid/). Scores are computed from the provider's own public artifacts under a published rubric.